Int IOState | Calibre UK UCA93 specification

CALIBRE

3.3.21.Write_IO_Pin

Function specification	int Write_IO_Pin (int IONumber, int IOState)
Parameters are:int IONumber
	The number of the IO pin (0 or 1) to be driven
	int IOState
Parameters returned	The required state (0 or 1) of the selected IO pin
Parameters returned	int
	Returns a 0 if function successful.
Prerequisites	Returns 0x800D if the transfer timed out.
Prerequisites	None
Functional description	Two spare IO pins are available to drive external logic. IO0 is on PL1 pin 2 and
	is an open drain driver. When driven low it can sink up to 10mA, when high it is
	high impedance and cannot source current. A pullup resistor should be fitted to
	the desired rail which should not exceed +5V. IO1 is on PL1 pin 3 and is a
	complementary driver which can source or sink up to 10mA. Its logic levels are
	fixed at 0V and +5V nominal.

3.3.22.Read_IO_Pin

Function specification	int Read_IO_Pin (int IONumber)
Parameters are:int IONumber
Parameters returned	The number of the IO pin (0 or 1) to be read
Parameters returned	int
	Returns the state (0 or 1) of the chosen IO pin if function successful.
Prerequisites	Returns 0x800D if the transfer timed out.
Prerequisites	None
Functional description	Two spare IO pins are available which can be driven by external logic. IO0 is
	on PL1 pin 2 and IO1 is on PL1 pin 3. These pins are normally high impedance
	input unless specifically driven by the Write_IO_Pin function. They can be
	driven high or low by external logic then read by the Read_IO_Pin function.
	Normal 5V CMOS logic levels (0 < 1.5V, 1 > 3.5V) should be applied for reliable
	reading.

Issue 1.0	Page 14
01/07/03

Image 17

Calibre UK UCA93 manual Int IOState

Contents

Calibre Calibre Contents General Introduction Connecting the Adapter to your SystemPacking List Bus Termination and Protection Bus Capacitance Limitations/Cable Choice Variable Voltage Bus Power Supply Introduction Installing the Adapter Libraries for Programming in Microsoft Windows Environments Function Prototypes Calibre Int ownaddress Int SlaveBlockTimeoutInt ClockSpeed Int BusVoltage SendAddress Int DataByteInt I2CData None Int I2Cstatus Using the Adapter Int NoTries Int NoBytesToSendInt DataVal Returns an unused integer Int NoBytesToTransmit Int TimeoutInt RdData Int NoBytesToReceive Int PullupVoltage Int Int IOState SendAddressNoStatus WriteByteNoStatus Stop Real-Time Bus Monitor Appendix a I2C Communications Adapter Status Codes Bit 4 The BER Bus Error BitBit 7 MSB The old PIN Bit Bit 5 The old STS Bit Polling the Status Register and how to avoid it USB Bus CharacteristicsBlock Functions Block Write Function Slave Receiver Function Slave Transmitter Function Calibre Question Get corrupted transfers why is this? When the the Most Commonly Asked I2C QuestionsGeneral Questions Question Do you have software to talk to my........?